Tension involves stretching or straining an object
The difference between the magnitude of the tension in the string is 25N
<h3>How to determine the tension difference</h3>
The tension acting on an object is calculated as:

Where:
- W represents the weight of the object
- m represents the mass of the object
- a represents the acceleration of the object
The question is incomplete, so we make use of assumed values.
Assume that the magnitude of tensions acting at the top and the bottom of the string are:
tt = 25N
tb = 50N
Then, the difference in the magnitudes would be:
T =tb - tt
T = 50N - 25N
T = 25N
Using the assumed values, the difference between the magnitude of the tension in the string is 25N
Read more about tension at:
brainly.com/question/19328375